US5171827AExpiredUtility

Particulate acicular para-aramide

52
Assignee: DU PONTPriority: Mar 5, 1990Filed: Jan 17, 1991Granted: Dec 15, 1992
Est. expiryMar 5, 2010(expired)· nominal 20-yr term from priority
Inventors:Don M. CoatesPatrick H. Young
D01D 5/11C08J 3/14D01F 6/605C08J 2377/10
52
PatentIndex Score
8
Cited by
17
References
1
Claims

Abstract

This invention relates to para-aramide particles. More particularly, the invention concerns a process for flash spinning such particles from a mixture of poly(paraphenylene terephthalamide), carbon dioxide and water.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. Poly(paraphenylene terephthalamide) in the form of acicular particles having a length of less than about 5 microns when dry and a ratio of particle length to particle diameter of at least about 2.

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